Valve.



No. 723,445. I PATENTED MAR. 24, 1903 E. DERUNTZ.

VALVE.

APPLICATION FILED JUNE 14, 1902.

N0 MODEL. 6

2 SHEETS-SHEET 1.

110.7%,445. I PATENTED MAR.24,1908. E.DERUNTZ.

, VALVE.

APPLICATION FILED JUNE 14, 1902. no MODEL: 2 SHEETS-SHEET 2,.

- UNITED STATES" PATENT OFFICE.

EUGENE DERUNTZ, OF DESOTO, MISSOURI, ASSIGNOR OF ONE-HALF TO WILLIAM T. DONNELLY AND OTIS MUNROE, OF DESOTO, MISSOURI.

VALVE.

SPECIFICATION forming part of Letters Patent No. 723,445, dated'M'arclJ. 24, 1903.

Application filed June 14, 1902. Serial No. 111,758- (No model.) I

To all whom it may concern:

Be it known that I, EUGENE DERUNTZ, a

citizen of France, residing at Desoto, J eflerson county, Missouri, have invented a certain new and useful Improvementiu Valves,'of-

which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a central sectional elevation transverse the valve and valve-casing. Fig.

2 is an elevation, chiefly in section, atri'ghtf angles to the view shown in Fig. 1, a portion of the valve being shown in side elevation. Fig. 3 is a detail view, in sectional elevation, on line 3 3 of Fig. 2. Fig. 4 is a detail in sectional elevation corresponding to Fig. 1, the

angular packing and the wear-plate being removed. Fig. 5 is a bottom plan view of the,

Fig. 6 is a top plan view of the valve proper. wear-plate, and Fig. 7 is a sectional elevation of the Wear-plate on the'line7 7 of Fig. 6.

My invention relates to valves, and more particularly to oscillating balanced valves, my object being to provide a valve of this character having easy movement and so constructed that the valve and valve-seat do not lose their proper curvature by reason of wear.

To these ends and also to improve generally upon devices of the character indicated my invention consists in the various matters hereinafter described and claimed.

Referring now more particularly to the drawings; 1 indicates a portion of a cylinder of an engine, this being here shown as a cylinder of a locomotive steam-engine.

2 and 3 refer to the usual steam-passages leading to the opposite ends of the cylinder.

4 is the customaryexhaust-port, and 5 indicates the steamways which extend transverse the cylinder and. open upon the upper surface thereof. I

The valve-casing 6 extends transverse the longitudinal axis of the cylinder and fits thereon, said valve-casing being secured in position in any suitable manner, as by bolts 7 passing through flanges or lugs 8 upon the sides of the casing and entering seats in the cylinder. The said casing is provided with a cylindrical longitudinal chamber 9 and has ports '10, 1 1, and12, which register, respectively, with the ports 2,3, and 4 when the said casing is in position upon the cylinder, said port-s10, l1, and 12 opening upon the bottom of the casing and also opening into the cylindrical chamber 9. The said casing is also provided withpassages 13, which register withthe steamways 5 when the parts are assembled and communicate with one end of the'said cylindrical chamber, said end being arbitrarily hereinreferred to as the rear.

The oscillating valve 14 is located in the chamber!) and is mounted upon a valve-stem or shaft 15, which is seated in the heads 16 of the casing, said shaft being provided with a crankarm 17 or other suitable connection by means of which the desired rocking movements are imparted to the valve. The valve is of less length than the said chamber, so that aspace isleft at the rear of the chamberfand said valve is hollow and is provided with supply-ports 17 and exhaust-port 18,

- adapted to register with the passages 10, 11,

and 12, i n'o'rder to supply steam to and exhaust the same from the cylinder, the registration of the ports and passages necessary to efiect such result being so well understood that no explanation of the same is deemed to be necessary in this specification. Steam being admitted to the steamways 5 passes into the space'in the rear of the chamber 9, enters the hollow valve, and is admitted to the cylinder in a well-understood manner.

In valves of the character of the present difficulty has been experienced in providing for an easy movement of the valve in its casing,considerable friction usually existing between the entire outer surface of the valve and the inner face of the casing, and a further difficulty has been experienced owing to the fact that the valve and its seat have been ground out of their'proper curves, thus producing a leaky structure. These dilficulties are obviated in the present device. 'The valve has a main or body portion 18, whose outer surface lies in a given circle throughout a portion of the circumference of said main valve portion and then extends inwardly at both sides of the valve, as shown at 19, said inwardly-extending portions producing shoulders and being connected by a surface 20, which is concentric with the curved surface portion first-above mentioned, but lies in the circumference of a smaller circle than that including the first-mentioned surface portion. Preferably the part 20 of the main portion of the valve is of slightly less diameter than. the interior diameter of the chamber 9, all danger of friction and wear between said portion 20 and the inner face of the said chamber beingth us removed, and as the valve is fixed upon the shaft 15 any tendency to bind is coufinedto the relatively small shaft-bearings.

The valve is provided with a substantially semicircular wear-plate 21, which fits in the recess formed by the reduced part of the main valve portion, said wear-plate being provided with'ports 22, which register with the supply-ports 23 of the main valve portion and combine with them to prod uoethe abovementioned ports 17, and said wear-plate is provided intermediate the said supply-ports 22 with an exhaust-port 24, which registers with the exhaust-channel 25 of the main valve portion, said exhaust-channel being produced by the web 26 in the usual manner. The said wear-plate has a close fit upon its seat in the valve-casing, and it is movable by its own weight toward and away from the center of the valve, so that when the, valve-seat and the Wearplate wear the said plate moves downwardly upon its seat, and the parts are ground to curved surfaces,and the wear-plate always closely engages its seat.

Suitable packing is provided to prevent the .escape of steam, and said packing is so arranged that free movement of the wear-plate from the main valve portion is permitted. The ports 23 and the channel 25 of the main portion of the valve and the ports 22 and 24 of the wear-plate. have material extending entirely around them, and transverse packing-grooves 27 and 28 are formed in the abutting surfaces of the body portion and wearplate, respectively, and at the ends thereof, said grooves being thus beyond the ends of the said ports and channel. Longitudinal packing-grooves 29 and 30 are formed in the body portion and wear-plate, respectively, upon each side of the exhaust-port 24 and exhaust-channel 25, all of the said grooves registering when the parts are assembled in a well understood manner. The transverse grooves receive packing-strips 31 and the longitudinal grooves receive packing-strips 32. Between the end grooves 27 the body portion of the valve is provided with packinggrooves 33, and between the transverse end grooves 28 the wear-plate is provided with longitudinal packing-grooves 34, which register with the said grooves 33 when the parts are assembled. The wear-plate is of a width slightly less than the distance between the shoulders 19, and angular packing-strips 35 have plates 36, which are received in the grooves 33 and 34, and plates 37, which extend outwardly from the plates 36 and lie between the said shoulders 19' and the edges of the wear-plate, said plates 37 engaging the face of the valve-seat tightly enough to effectually prevent the passage of steam above them. The plates 36 are only of such length that they extend between the transverse grooves 27 and 28; but the plates 37 are of the length corresponding to the length of the valve. End grooves 38 extend about the valve, being formed in the main portion. The wear-plate and the plates 37 of the packingstrips 35 and expansible packing-rings 39 are received in said grooves, these expansible or split packing-rings permitting the necessary movement of the wear-plate from the main portion of the valve in order to insure the seating of said plate upon the inner surface of the casing, as previously explained.

Steam being received in the hollow valve, said valve'is balanced, and even when the ports 17 are closed, as shown in Fig. 1, and the steam tends to lift the valve the valve does not bind against its seat, but the only pressure is between the relatively small shaft and its bearings. The packing effectually prevents the escape of the steam and at the same time the valve is so constructed and the packing is so arranged that the wear-plate is at all times properly seated against the inner surface of the chamber.

I am aware that many minor changes in the construction. arrangement, andcombination of the several parts of my device can be made and substituted for those herein shown and described without in the least departing from the nature and principle of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. The combination with a valve-seat, of a main valve portion, a Wear-plate thereon and cooperating with said seat, said plate being movable with relation to said seat, and packing between said main valve portion and said plate and adapted to be operative in the various relations of said plate to said main valve portion; substantially as described.

2. The combination with a valve-seat,'of a main valve portion, a wear-plate thereon and cooperating with said seat, said plate being movable with relation to said main valve portion and said main valve portion and said plate being provided with cooperating packing-grooves, and packing in said grooves; substantially as described.

3. The combination with a valve-seat, of a main valve portion having a reduced part, a wear-plate in said reduced part and cooperating with said seat, and angular packing between said plate and main valve portion at the edges of said plate and extending to the outer surface of said plate; substantially as described.

4. The combination with a main valve portion, of a wear-plate thereon and movable away from the same, and packing-rings about said valve and adapted to permit said movement ofsaid plate; substantially as described.

5. The combination with a main valve portion having a reduced part, of a wear-plate in said reduced part and movable away from said main valve portion, packing between said parts at the edges of said plate, grooves in said plate, packing and main valve portion, and packing-rings in said grooves; substantially as described.

6. The combination with a main valve portion having a curved part and a reduced portion, of a wear-plate in said reduced portion, registeringsteam-passages in said main valve portion and said plate, said passages comprising a central exhaust-passage and supplypassages upon the sides thereof, transverse cooperating packinggrooves in said main valve portion and said plate beyond the ends of said passages, cooperating longitudinal packingrooves at the sides of said central passage, packing in said grooves, cooperating packing-grooves in said main valve portion and said plate at the edges of the latter, and angular packing having plates in said lastmentioned grooves and plates extending between the said main valve portion and said wear-plate at the edges of the latter and to the outer surface thereof; substantially as described.

7. The combination with a main valve portion having a curved part and a reduced portion, of a wear-plate in said reduced portion, registering steam-passages in said main valve portion and said plate, said passages comprising a central exhaust-passage and supplypassages upon the sides thereof, transverse cooperating packinggrooves in said main valve portion and said plate beyond the ends of said passages, cooperating longitudinal packing-grooves at the sides of said central passage, packing in said grooves, cooperating packingrooves in said main valve portion and said plate at the edges of the latter, and angular packing having plates in said lastmentioned grooves and extending between the packing in said transverse grooves and plates extending outwardly between said main valve portion and said wear-plate and also extending over said transverse grooves; substantially as described.

In testimony whereof I hereunto affix my signature, in the presence of two witnesses, this 11th day of June, 1902.

EUGENE DERUNTZ.

WVitnesses:

GALEs P. MOORE, GEORGE BAKEWELL. 

